Gearing.



H. P. TOWNSEND.

BEARING.

APPLICATION FILED SEPT- 17. 1910.

1,155,847. Patented Oct. 5, 1915.

W] T NESSES; [N V N T 0R.

, table 7 at its upper end,

p err Guanine.

Application filed September 1 To, all whom it may concern:

Be it known that I, HARRY I. Townsnnp, a citizen of the United States,and a resident of WVaterbury, in the county'of New Haven and State ofConnecticut, have invented a new and Improved Gearing, of which thefollowing is a specification.

\Vhile my invention relates generally to drill presses, it is especiallyapplicable to that class known as vertical drills, and the object of myinvention is to provide a device having numerous no-vel features ofadvantage and utility.

One form of device in the use of which the objects herein set out may beattained is illustrated in the accompanying drawings in which- Figure 1is a view in side elevation of a drill press embodying my invention.Fig. 2 is a front view of the same. Fig. 3 1s a top plan view of theupper portion of the machine, the base and lower parts belng omitted forsake of clearness.

The invention herein illustrated and described is not confined in itsuse to any specific machine, but as it readily adapts 1tself for use ina drill press of the vertical type I have selected such for the purposeof illustration and description herein.

In the accompanying drawings the numeral 6 denotes the base, that may beof any approved form and material, having a and also supporting a column8. A bracket 9 depends from the under side of the table and supports ap1voted feed lever 10.

A drill spindle 23 is mounted in spindle supporting arms 24' projectingfrom the column 8. In machines of this class it is not always desirableto feed the work to the. spindle, and I therefore provide means for alsofeeding the spindle toward the work. This. however, of itself forms nopart of my invention, and a detailed description will therefore beomitted herein, it being sufficient to state that the spindle islongitudinally movable in its supporting arms by mechanism well known indevices of this class, a cone pulley 25 being splined to the spindlebetween the arms 24.

My invention contemplates a structure in which the length of thehorizontal run of the belt between its points of contact with the conepulley and idler pulleys to be hereinafter described remains practicallyunchanged as it is shifted from one to another between said stepsSpecification of Letters Patent. Patented Oct. 5, 1915.,

7, 1910. Serial in. 582,446.

face of the cone pulley. Ihe width of the faces of the cone pulley beinga factor that determin es the amount of'vertica-l movement of thehorizontal run of the belt in a change from one to another face of thepulley,it being of course'understood that the belt is of a width toproperly fit the faces of the cone pulley, adjacent steps to thedifference in diameter that, aside from the necessary change inthelength of the vertical run of the belt, the difference in length istaken care of and the tension always maintained. j v

Two idlers 39-'4l), the former having a face wider than the belt, andthe latter a face substantially the same as that ofthe belt, are mountedto move practicallyiin a straight line in a vertical direction, the mostsatisfactory construction including an angu- I so proportion the widthof lar lever, one arm of which supports said This lever is pivotallymounted on the column 8 andv is so disposed that the extreme movement ofthe pulleys isfrom a position a short distance from a horizontal idlers.

line passing through the pivot l2 to a posi tionon'the opposite side ofand the same distance from said line which is indicated by the letter a,as illustrated inthe drawings. The arm e 3 of the lever ex-v Fig. 1 oftends along the side of the column 8' its] lower end being provided witha lock screw 44 arranged to enter locking. recesses &5. in the side ofthe column.

A'belt 46, which as above a width to properly fit the faces of the conepulley, passes from a driving pulley &8 on a counter shaft 47 driven inany suitable manner, and it will be noted, from an examination of Fig.1, that when the belt is moved from one step to another of the pulleythe length of'its horizontal run from described is of the points whereit makes contact with the cone pulley to the idlers remains unchanged,the width and depth of successive steps on the cone pulley being soproportioned as to compensate for any difference in the length of thebelt not otherwise provided for. I do not limit my invention to amachine constructed specifically in accordance with the foregoingillustration and description'of the preferred form, as these may bedeparted from to a greater or less extent and yet be within the scopeand intent'of the invention.

It will be noted that in changing from a lower to a higher speed thebelt is wrapped to a greater extent around the cone pulley.

This increase of belt contact from a higher to a lower speed caused bythe arrangement of the idlers and other mechanism enables an increasedpower to be obtained on the lower speeds where such is desirable.

I claim 1. In combination with a horizontally-arranged shaft, asupporting frame located be low the level of said shaft, a spindle withits axis vertically disposed mounted in said frame, a cone pulleyarranged on said spindle, a bent stub shaft mounted on said frame,idlers mounted on the bent shaft in fixed relative positions with theaxis of one disposed at 'an angle relative to the axis of the other, asingle-faced pulley upon said horizontal shaft, a driving belt passingover said pulleys and idlers, and means for changing the position of theidlers relative to the frame to direct the belt to a selected face ofthe cone pulley. 1

In combination with a horizontally-arranged shaft, a supporting framelocated below the level of said shaft, a spindle with its axisvertically disposed mounted in said frame, a cone pulley secured to saidspindle, a stub shaft having an offset end mounted on said frame, a pairof idlers adjustably mounted on said stub-shaft in fixed relativepositions with the axis of one angularlydisposed relative to the axis ofthe other, a driving belt passing over said pulley, idlers andhorizontally-arranged shaft, one of said idlers being mounted with itsplane arranged parallel to a plane passing vertically through the axisof the spindle'directly from the front to the back of the frame.

3. In a drill press, a supporting frame, a spindle mounted therein withits axis vertically arranged, a stepped cone pulley setending to thefront cured to the spindle, a power shaft, a singlefaced power pulley onthe power shaft, rigidly-connected idlers adjustably mounted on theframe with the'axis of one angularlydisposed relative to the axis of theother, the axis of the power pulley being parallel to the axis of one ofthe idlers, a driving belt passing directly over said cone pulley,idlers and power pulley, one of said idlers having its face locatedsubstantially at right angles to the direction of travel of the beltfrom the front of the frame to the rear thereof, and means forpositioning the idlers with respect to the cone pulley.

4. In a drill press, a supporting frame, an overhead driving shaft, avertical spindle mounted insaid frame, a carrier pivetally mounted uponthe frame with a handle exthereof, idler pulleys mounted on the carrier,a single-faced driving pulley mounted on said shaft with its axisarranged substantially in a plane at right angles to a plane passingdirectly from the front t, the rear of the supporting frame and parallelto the axis of one of the idlers, said carrier being arranged to movethe idlers in substantially a straight line par allel to the spindle, astepped cone pulley mounted on the spindle, a driving belt passing overthe cone pulley, idlers and singlefaced driving pulley, the width ofadgacent steps or faces of the cone pulley being proportioned to thedifference in diameter of said steps to compensate for the change ofpositions of the idlers to maintain a taut stretch of the horizontal runof the belt.

HARRY rd TOWNSEND.

Witnesses:

JAMES J. CArFREY, HAROLD W. CAMPBELL.

Copies of this patent may be pbtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

